164 (#224) ############################################ WOOLLEN AND WORSTED SPINNING be safe to arrange for one blending-room and equipment for every ten or twelve cards. Thus the single blending- room equipment here portrayed may be followed by twelve cards and the necessary spindles to consume the production of these cards. It should be noted, however, that cards dealing with coarser material and condensing to thicker counts will usually consume more material than cards dealing with fine material and condensing to fine counts. In the worsted industry cross-bred cards are made to turn off up to 70 lb. per hour, while some botany cards are only turning off 20 to 30 lb. per hour! Ir the woollen industry 72-in. carders turn off from 30 lb. to 80 lb. per hour with a variation of at least 50 per cent. between individual firms dealing with the same class of wool. In Fig. 52 an American woollen plant is illustrated, this being housed in a storied building. This par- ticular plant was running on fine hosiery yarns, in some cases randoms”-and it is safe to argue that the carding surface arranged for is not sufficient to meet the requirements of Yorkshire woollen manu- facturers. The following particulars respecting this plant should be studied : (a) Cubical content of material store-room; (6) Area of blending-room; (C) Cubical content of mellowing-room ; (d) Conveyer system from blending-room to cards; (e) Arrangement of building to suit cards; W) Cylinder lifting and card-grinding arrangements ; (g) Storage of condensed slivers in both card-room and mule spinning-room ; (h) Arrangement of winding and twisting machinery ; © Yarn storage and conditioning. * * Not included in the plan. 166